cachematrix.R

cachematrix.R

@@ -2,14 +2,34 @@
 ## functions do
 
 ## Write a short comment describing this function
+A pair of functions that cache the inverse of a matrix.
+This function creates a special “matrix” object that can cache its inverse.
 
 makeCacheMatrix <- function(x = matrix()) {
-
+  inv <- NULL
+  set <- function(y){
+    x <<- y
+    inv <<- NULL
+  }
+  get <- function() x
+  setInverse <- function(solveMatrix) inv <<- solveMatrix
+  getInverse <- function() inv
+  list(set = set, get = get, setInverse = setInverse, getInverse = getInverse)
 }
 
-
 ## Write a short comment describing this function
 
+## This function computes the inverse of the special "matrix" returned by makeCacheMatrix above.
 cacheSolve <- function(x, ...) {
-        ## Return a matrix that is the inverse of 'x'
+  ## Return a matrix that is the inverse of 'x'
+
+inv <- x$getInverse()
+  if(!is.null(inv)){
+    message("getting cached data")
+    return(inv)
+  }
+  data <- x$get()
+  inv <- solve(data)
+  x$setInverse(inv)
+  inv      
 }